Cross-head connection



A. A. ASHTON lCROSS-HEAD CONNECTION Aug. 18, 1953 Original Filed March 6, 1948 Patented Aug. 18, 1953 UNITE-'D STATES PATENT OFFICE CROSS-HEAD `CONNECTIUN Albert` A. Ashton, Houston, TeX., as'signor to Emsco Manufacturing Company, Los Angeles, Calif., a corporation of California Original application March 6, 1.948, Serial No. 13,45@ Divided` and this application October 29, 1949, Serial No. 124,454

Claims; 1

The present application constitutes'a division of my co-pending application, Serial No. 13,459, led March 6, 1948, now abandoned, andthe invention disclosed herein relates to a'simple; heavy duty cross-head connection.

It is one object of the herein described invention to provide an improved cross-head' connection of novel design, wherein bearing forces in the connection will' be distributed over a greater area, and the connection parts cooperate in such manner as to stabilize the associatedA driving' eccentric strap mounting;

A further object is to-provide novelv means for retaining the cross-head pin' in' operative position, and which facilitates disconnection of the eccentric driving strap, When necessary.

Still another object is to providek an improved cross-head connection, having novel meansl for releasably retaining the cross-head' pin in circumferentially adjusted position, so" as'to enable presentation of new wearing surfaces on` the pin, without the necessity of having' to remove the pin.

Further objects of the invention will be brought out in the following part of the specication, wherein detailed description is for the purpose of fully disclosing preferred embodiments of the invention without' placing limitations on the scope of the invention deiinedinthe appended claims.

Referring to the drawings which; are for illustrative purposes only:

Fig. l is a fragmentary side' view, portions of the casing being removed and. certain parts being in section to show the cross-head connection and the parts which it connects;

Fig. 2 is an enlargedtransverse section, taken substantially on line 2--2 of Fig. l; and

Fig. 3 is a cross-section taken on theline 3--3 of Fig. 2.

In Fig. l, the cross-head connection is shown as part of a heavy duty pumphaving power and fluid sections A and B. The power section A includes a housing 29 including parts 22', 23', 21|, 25, 3Q and 32, whichcontainspower transmission shafts i 8 and 48. supportedpby bearing means 3'I .and 59, anda crank. shaft. 6.11 supported by bearing means fifi. Thefluidend` B includes a pump casting 'di supported..by a: housingv` wall 26 and having a generally tubular horizontally disposed body portion 'I8 defining a cylinder bore 'F9 which is operatively associated with a plunger 8B to form a positive displacement pumping mechanism. The innermost end of the plunger 80 is connected to a cross-head extension member Il4.

The cross-head extension im passes through a chamber 2i' and an opening tt' in a' housing wall member 36. A ring'y |2| is secured thereover, as by suitable studs |22 with associated nuts |23'. The ring |2| is recessed to` receive a packing iil therein and surrounding the cross-headv extension IM. This packing is retained' by a packing gland titl provided` with projecting' lugs IZt' associated with guide studs |27 SupD'Grted in the stufng box ring and having nuts |23, by' means of which the packing gland maybe moved into the ring recess to compress the packing therein.

The opposite end of the cross-head extension III, from the one which is connected to the plunger @il has associated therewith a cross-head |29 vwhich is supported for reciprocabler movement in the cross-head barrel 3|", the bore of the cross-head barrel being axially aligned with the opening i2@ in the Walrmeinber 3c. The cross-head has upper and lower wall: portions ISG, as shown in Fig. 1, which provide bearing surfaces for engagement with associated crosshead `guide wallsl disclosed as shoes I3|`I3I. These shoes are t'ted'into recessed' portions in the interior of the barrel 3| andare provided with beveled edges for engagement-with beveled edgesof the recess. The shoes are retained against removal fromthe barrel by" means of retaining lugs |32 secured at the inner end' of the barrel by means of associated studs |33 and retaining nuts |35",

As shown in Fig. 2, theV cross-head' |29fis-'internally recessed as generally indicated' by the numeral |35 to dennel spaced apart side walls IMA-|35 having axially aligned apertures or openings IS'! therein for receiving in each* case a bushing |38.

The shaft 6l has a connection with theY crosshead of a pumpingmechanism, this connection being accomplished by meansofr a connecting rod or link |39 formed: at its crank engaging end into a continuous ring'portion itil within which there is'supported an anti-friction bearing connection with the eccentric.

The link |39 has its opposite end formed to provide a split ring I4I which is connected-with the cross-head by inserting this end of the strap between the side walls` I3Ii-I3'into` thev recessY |35, and pivotally retainingY this end of the strap from removal from the cross-head by means of a pin |42 which is inserted within the split ring I 4I and has its end portions trunnioned in the bushings |31 respectively. The split ring is clamped on the pin |42 by a clamping bolt |43 arranged to draw the two sections of the split ring together. This clamping bolt also is arranged so as to position the pin |42 in an axial direction and retain the pin against axial movement within the split ring IM. As shown in Fig. 3, the pin |42 is provided with a circum- 5 ferentially extending groove .ldwhich is posi-v tioned intermediate theends of the pin. It will also be noted that the bolt |253 inoperative position has its periphery extending into the groove fr l, whereby the bolt acts as a detent for locking` 1'0'7' the pin against axial movement.

With this arrangement, it will be apparentgthat by loosening the bolt |43, thepi n1 imaybe ciricumferentially shifted without removing 'fit Y'from its bearing supports so as to subject new 'areas 15 to wear. Moreover, the provisionofLspaced bear-a ings |31 respectively positioned at' the'-endsof` the pin |42 results in application of the thrust`V of the link |39 to the center of the cross-.head |29. e

In order to permit disconnection of the strap and cross-head, the uppermost portion |39 of the cross-head is provided -with an opening |45 which is positioned directly above the head of the bolt M3. The upper cross-head guide shoe |31 is also providedwith an opening |46 which is in registration with a passage |41 in the associated wall portion offthe cross-head barrel 3|. These openings are so arranged that during the operation of the crank, the opening U55 30 will at one position of the crank be brought into registration with the opening |66 and passage lfi so that access to the bolt |43 through these openings will be possible toenable removal of the bolt i133. Having removed the -bolt M3, it will no longer lock the pin |42 against axial movement,v and the pin |42 may be withdrawn through a segmental notch |48 provided at the adjacent end of the cross-head barrel 31Cv I claim:

l. In a cross-headrconnection for transmitting thrust between a driving member and a driven member, a cross-head for connection to one of said members, said cross-head having spaced bearing walls, a pin positioned between said bearing walls for securing an end of the other of said members to the cross-head, a locking member retaining said pin against axial removal, cross-head guides respectively engaged by the nearing walls, one offsaid guides and its associ- 50 ated bearing wall having openings brought into registration at a predetermined*position-of the cross-head for accessV to and removal of the locking member to release said pin.

2. In a cross-head connection for a link member and a reciprocable member, a cross-head connected with the reciprocable member, spaced bearings carried by said cross-head, said link member having a split clamping end positioned between said bearings, a pinV extendingV through said split end having its ends trunnioned in said bearings, a circumferentially extending groove intermediate the ends of said pin, a member for actuating said split end into clamped engagement with said pin, said latter member extending into said groove to restrain'the 'pin against axial movementsjbut enable; rotational adjustment of the pin, when the split "end is unclamped relative to the pin and guide means forsaid'piston provided 4 with a lateral opening through which said pin may be removed and said cross-head disconnected from said link member.

3. In a cross-head connection for transmitting thrust between a driving member and a driven member, a cross-,head forvrconnection` to one of said members, said cross-'headfha'ving' spaced bearing walls, a pin positioned between said bearing walls for securing an end of the other of said members to the cross-head, a screw member retaining said pin against axial removal, crosshead ,guides respectively engaged by the bearingvvalls,v oneof said guides and its associated i bearing wall having openings brought into registrationY at a predetermined position of the crosshead for access to and rotation of the screw memberto release said pin.

fiiIn a cross-head connection for a link member and a reciprocable member, a cross-head connected with the reciprocable member, spaced bearings and spaced bearing walls carried by said cross-head, said link member having a Y'split clamping end positioned between said bearings, a pin extending through said split end having Yits ends trunnioned in said bearings, a circumferentially extending groove intermediate the ends of said pin, and a screw for actuating said split end into clamped engagement with said pin, said screw extending into said groove to restrain the pin against axial movements, but enable rotational adjustment of the pin, when the split end is unclamped relative to the pin, cross-head guides respectively engaged bythe bearing walls, one or" said guides and its associated bearing wall having openings brought into registration at a predetermined position of the cross-head for access to and rotation of the screw member t0 release said pin.

5. In a cross-head connection for transmitting thrust between a driving member and a driven member, a cross-head for connection to one of said members, said cross-head having spaced bearing walls, a pin positioned between said bearing walls for securing an end of the other of said members to the cross-head, a screw member retaining said pin against axial removal, a supporting structure, cross-head guides supported by said supporting structure so 'as to be respectively engaged by the bearingr walls, one of said guides and its associated bearing-wall having openings brought into registration at a predetermined position of the cross-head for Vaccess to and rotation of the screw member to release said pin, and said structure being formed so as to provide a space through which said pin may be withdrawn from'said cross-head.

ALBERT A. ASHTON.

References-Cited in the le of this patent UNITED SIATES lEliTElWISv Numbery Name Date 487,895 Stanwood Dec. 13, 1892 1,147,915 Ayers July 2'?, 1915 1,524,554 Keen Jan. 27, 1925 1,590,253 Parsons June 29, 1926 1,604,793 Stratton Oct. 26, 1926 2,430,176 I-Iusted Nov. 4, 194:7y 2,461,056 Hess Feb. 8, 1949 

